I did it a lot in gay cruising bars.
But the best was probably in Berlin, at kitkatclub. This club is a straight dancing club. Open. Lots of sex everywhere.
I got this temporary tattoo on my chest "cock sucker". Clearly visible as I stayed shirtless the entire night.
A guy came to see me, asking if I was serious about my tattoo. I gave him confirmation. Slightly stressed, he said : "a friend of mine told me gays give better head than women is it true?"
I looked at him and answered I could not say as I never received one from a woman. But I could suck him now.
We went in a corner, on a bed and I sucked him during at least 25min. Doing my best to impress him.
When I lifted up my head, looking around, there were at least 10 people looking at us. The funniest were those straight couples. You could see the girls impressed by the way I was doing it. And the guys looking at them in a way "look. That's how you should do!"
I will definitely attend a party there again.